Vokaruid

Vokaruid is a series of fanmade vocaloid containing younger versions/siblings of Vocaloids. The only Vokaruids so far are Lulu Megurine and Yuki Haku, but in the near future there will be others!

Vokaruids on Fanloid Wiki

 * Lulu Megurine, the younger version of Megurine Luka.
 * Mimi Hatsune, the younger version of Hatsune Miku.
 * Midori Hatsune is often seen like a relative to Hatsune Miku because of the references in the character's storyline, though this is not official.
 * Kai Shion, the younger version of Kaito.
 * Mei-Mei Sakine, the younger version of Meiko. Sakine Meiko is also a young Meiko, but is not classified as a Vokaruid.
 * Ritsu and Lenny Kagamine, the younger versions of Kagamine Rin and Kagamine Len.
 * Gackipo Kamui, the younger version of Kamui Gakupo.
 * Gumiko Megpoid, the younger version of Gumi.
 * Yuki Haku, the younger version of Yowane Haku.
 * While they are not classed as Vokaruids, Naru Akita is a younger sister to Neru while Nero Akita is sometimes considered to be her younger brother.

Trivia

 * There may be others in the future, including younger versions of Lily and Neru!